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Renamed opt_const to opt_expr

This commit is contained in:
Clifford Wolf 2016-03-31 08:43:28 +02:00
parent d31c968d76
commit 1d0f0d668a
14 changed files with 84 additions and 83 deletions
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2
backends/btor/verilog2btor.sh
View File

@ -22,7 +22,7 @@ hierarchy -top $3;
hierarchy -libdir $DIR;
hierarchy -check;
proc;
opt; opt_const -mux_undef; opt;
opt; opt_expr -mux_undef; opt;
rename -hide;;;
#techmap -map +/pmux2mux.v;;
splice; opt;

4
manual/APPNOTE_012_Verilog_to_BTOR.tex
View File

@ -208,7 +208,7 @@ read_verilog -sv $1;
hierarchy -top $3; hierarchy -libdir $DIR;
hierarchy -check;
proc; opt;
opt_const -mux_undef; opt;
opt_expr -mux_undef; opt;
rename -hide;;;
splice; opt;
memory_dff -wr_only; memory_collect;;
@ -263,7 +263,7 @@ read_verilog -sv $1;
hierarchy -top $3; hierarchy -libdir $DIR;
hierarchy -check;
proc; opt;
opt_const -mux_undef; opt;
opt_expr -mux_undef; opt;
rename -hide;;;
splice; opt;
memory;;

16
manual/CHAPTER_Optimize.tex
View File

@ -15,7 +15,7 @@ passes that each perform a simple optimization:
\begin{itemize}
\item Once at the beginning of {\tt opt}:
\begin{itemize}
\item {\tt opt\_const}
\item {\tt opt\_expr}
\item {\tt opt\_share -nomux}
\end{itemize}
\item Repeat until result is stable:
@ -25,13 +25,13 @@ passes that each perform a simple optimization:
\item {\tt opt\_share}
\item {\tt opt\_rmdff}
\item {\tt opt\_clean}
\item {\tt opt\_const}
\item {\tt opt\_expr}
\end{itemize}
\end{itemize}
The following section describes each of the {\tt opt\_*} passes.
\subsection{The opt\_const pass}
\subsection{The opt\_expr pass}
This pass performs const folding on the internal combinational cell types
described in Chap.~\ref{chapter:celllib}. This means a cell with all constant
@ -57,11 +57,11 @@ this pass can also optimize cells with some constant inputs.
$a$ & 1 & $a$ \\
1 & $b$ & $b$ \\
\end{tabular}
\caption{Const folding rules for {\tt\$\_AND\_} cells as used in {\tt opt\_const}.}
\label{tab:opt_const_and}
\caption{Const folding rules for {\tt\$\_AND\_} cells as used in {\tt opt\_expr}.}
\label{tab:opt_expr_and}
\end{table}
Table~\ref{tab:opt_const_and} shows the replacement rules used for optimizing
Table~\ref{tab:opt_expr_and} shows the replacement rules used for optimizing
an {\tt\$\_AND\_} gate. The first three rules implement the obvious const folding
rules. Note that `any' might include dynamic values calculated by other parts
of the circuit. The following three lines propagate undef (X) states.
@ -76,10 +76,10 @@ an undef value or a 1 and therefore the output can be set to undef.
The last two lines simply replace an {\tt\$\_AND\_} gate with one constant-1
input with a buffer.
Besides this basic const folding the {\tt opt\_const} pass can replace 1-bit wide
Besides this basic const folding the {\tt opt\_expr} pass can replace 1-bit wide
{\tt \$eq} and {\tt \$ne} cells with buffers or not-gates if one input is constant.
The {\tt opt\_const} pass is very conservative regarding optimizing {\tt \$mux} cells,
The {\tt opt\_expr} pass is very conservative regarding optimizing {\tt \$mux} cells,
as these cells are often used to model decision-trees and breaking these trees can
interfere with other optimizations.

2
manual/CHAPTER_Overview.tex
View File

@ -488,7 +488,7 @@ select.cc}, {\tt show.cc}, \dots) and a couple of other small utility libraries.
\item {\tt passes/} \\
This directory contains a subdirectory for each pass or group of passes. For example as
of this writing the directory {\tt passes/opt/} contains the code for seven
passes: {\tt opt}, {\tt opt\_const}, {\tt opt\_muxtree}, {\tt opt\_reduce},
passes: {\tt opt}, {\tt opt\_expr}, {\tt opt\_muxtree}, {\tt opt\_reduce},
{\tt opt\_rmdff}, {\tt opt\_rmunused} and {\tt opt\_share}.
\item {\tt techlibs/} \\

6
manual/PRESENTATION_ExSyn.tex
View File

@ -144,7 +144,7 @@ The {\tt opt} command implements a series of simple optimizations. It also
is a macro command that calls other commands:
\begin{lstlisting}[xleftmargin=0.5cm, basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys]
opt_const # const folding
opt_expr # const folding and simple expression rewriting
opt_share -nomux # merging identical cells
do
@ -153,7 +153,7 @@ do
opt_share # merging identical cells
opt_rmdff # remove/simplify registers with constant inputs
opt_clean # remove unused objects (cells, wires) from design
opt_const # const folding
opt_expr # const folding and simple expression rewriting
while [changed design]
\end{lstlisting}
@ -161,7 +161,7 @@ The command {\tt clean} can be used as alias for {\tt opt\_clean}. And {\tt ;;}
can be used as shortcut for {\tt clean}. For example:
\begin{lstlisting}[xleftmargin=0.5cm, basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys]
proc; opt; memory; opt_const;; fsm;;
proc; opt; memory; opt_expr;; fsm;;
\end{lstlisting}
\end{frame}

2
passes/opt/Makefile.inc
View File

@ -5,7 +5,7 @@ OBJS += passes/opt/opt_muxtree.o
OBJS += passes/opt/opt_reduce.o
OBJS += passes/opt/opt_rmdff.o
OBJS += passes/opt/opt_clean.o
OBJS += passes/opt/opt_const.o
OBJS += passes/opt/opt_expr.o
ifneq ($(SMALL),1)
OBJS += passes/opt/share.o

28
passes/opt/opt.cc
View File

@ -37,7 +37,7 @@ struct OptPass : public Pass {
log("a series of trivial optimizations and cleanups. This pass executes the other\n");
log("passes in the following order:\n");
log("\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_share [-share_all] -nomux\n");
log("\n");
log(" do\n");
@ -46,13 +46,13 @@ struct OptPass : public Pass {
log(" opt_share [-share_all]\n");
log(" opt_rmdff\n");
log(" opt_clean [-purge]\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" while <changed design>\n");
log("\n");
log("When called with -fast the following script is used instead:\n");
log("\n");
log(" do\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n");
log(" opt_share [-share_all]\n");
log(" opt_rmdff\n");
log(" opt_clean [-purge]\n");
@ -66,7 +66,7 @@ struct OptPass : public Pass {
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
std::string opt_clean_args;
std::string opt_const_args;
std::string opt_expr_args;
std::string opt_reduce_args;
std::string opt_share_args;
bool fast_mode = false;
@ -81,33 +81,33 @@ struct OptPass : public Pass {
continue;
}
if (args[argidx] == "-mux_undef") {
opt_const_args += " -mux_undef";
opt_expr_args += " -mux_undef";
continue;
}
if (args[argidx] == "-mux_bool") {
opt_const_args += " -mux_bool";
opt_expr_args += " -mux_bool";
continue;
}
if (args[argidx] == "-undriven") {
opt_const_args += " -undriven";
opt_expr_args += " -undriven";
continue;
}
if (args[argidx] == "-clkinv") {
opt_const_args += " -clkinv";
opt_expr_args += " -clkinv";
continue;
}
if (args[argidx] == "-fine") {
opt_const_args += " -fine";
opt_expr_args += " -fine";
opt_reduce_args += " -fine";
continue;
}
if (args[argidx] == "-full") {
opt_const_args += " -full";
opt_expr_args += " -full";
opt_reduce_args += " -full";
continue;
}
if (args[argidx] == "-keepdc") {
opt_const_args += " -keepdc";
opt_expr_args += " -keepdc";
continue;
}
if (args[argidx] == "-share_all") {
@ -125,7 +125,7 @@ struct OptPass : public Pass {
if (fast_mode)
{
while (1) {
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_expr" + opt_expr_args);
Pass::call(design, "opt_share" + opt_share_args);
design->scratchpad_unset("opt.did_something");
Pass::call(design, "opt_rmdff");
@ -138,7 +138,7 @@ struct OptPass : public Pass {
}
else
{
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_expr" + opt_expr_args);
Pass::call(design, "opt_share -nomux" + opt_share_args);
while (1) {
design->scratchpad_unset("opt.did_something");
@ -147,7 +147,7 @@ struct OptPass : public Pass {
Pass::call(design, "opt_share" + opt_share_args);
Pass::call(design, "opt_rmdff");
Pass::call(design, "opt_clean" + opt_clean_args);
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_expr" + opt_expr_args);
if (design->scratchpad_get_bool("opt.did_something") == false)
break;
log_header("Rerunning OPT passes. (Maybe there is more to do..)\n");

75
passes/opt/opt_const.cc → passes/opt/opt_expr.cc
View File

@ -179,7 +179,7 @@ bool group_cell_inputs(RTLIL::Module *module, RTLIL::Cell *cell, bool commutativ
log("\n");
}
cover_list("opt.opt_const.fine.group", "$not", "$pos", "$and", "$or", "$xor", "$xnor", cell->type.str());
cover_list("opt.opt_expr.fine.group", "$not", "$pos", "$and", "$or", "$xor", "$xnor", cell->type.str());
module->remove(cell);
did_something = true;
@ -304,7 +304,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
for (auto cell : cells.sorted)
{
#define ACTION_DO(_p_, _s_) do { cover("opt.opt_const.action_" S__LINE__); replace_cell(assign_map, module, cell, input.as_string(), _p_, _s_); goto next_cell; } while (0)
#define ACTION_DO(_p_, _s_) do { cover("opt.opt_expr.action_" S__LINE__); replace_cell(assign_map, module, cell, input.as_string(), _p_, _s_); goto next_cell; } while (0)
#define ACTION_DO_Y(_v_) ACTION_DO("\\Y", RTLIL::SigSpec(RTLIL::State::S ## _v_))
if (clkinv)
@ -366,7 +366,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (new_a != RTLIL::State::Sm && RTLIL::SigSpec(new_a) != sig_a) {
cover("opt.opt_const.fine.$reduce_and");
cover("opt.opt_expr.fine.$reduce_and");
log("Replacing port A of %s cell `%s' in module `%s' with constant driver: %s -> %s\n",
cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_a), log_signal(new_a));
cell->setPort("\\A", sig_a = new_a);
@ -392,7 +392,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (new_a != RTLIL::State::Sm && RTLIL::SigSpec(new_a) != sig_a) {
cover_list("opt.opt_const.fine.A", "$logic_not", "$logic_and", "$logic_or", "$reduce_or", "$reduce_bool", cell->type.str());
cover_list("opt.opt_expr.fine.A", "$logic_not", "$logic_and", "$logic_or", "$reduce_or", "$reduce_bool", cell->type.str());
log("Replacing port A of %s cell `%s' in module `%s' with constant driver: %s -> %s\n",
cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_a), log_signal(new_a));
cell->setPort("\\A", sig_a = new_a);
@ -418,7 +418,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (new_b != RTLIL::State::Sm && RTLIL::SigSpec(new_b) != sig_b) {
cover_list("opt.opt_const.fine.B", "$logic_and", "$logic_or", cell->type.str());
cover_list("opt.opt_expr.fine.B", "$logic_and", "$logic_or", cell->type.str());
log("Replacing port B of %s cell `%s' in module `%s' with constant driver: %s -> %s\n",
cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_b), log_signal(new_b));
cell->setPort("\\B", sig_b = new_b);
@ -429,13 +429,13 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (cell->type == "$logic_or" && (assign_map(cell->getPort("\\A")) == RTLIL::State::S1 || assign_map(cell->getPort("\\B")) == RTLIL::State::S1)) {
cover("opt.opt_const.one_high");
cover("opt.opt_expr.one_high");
replace_cell(assign_map, module, cell, "one high", "\\Y", RTLIL::State::S1);
goto next_cell;
}
if (cell->type == "$logic_and" && (assign_map(cell->getPort("\\A")) == RTLIL::State::S0 || assign_map(cell->getPort("\\B")) == RTLIL::State::S0)) {
cover("opt.opt_const.one_low");
cover("opt.opt_expr.one_low");
replace_cell(assign_map, module, cell, "one low", "\\Y", RTLIL::State::S0);
goto next_cell;
}
@ -462,7 +462,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (0) {
found_the_x_bit:
cover_list("opt.opt_const.xbit", "$reduce_xor", "$reduce_xnor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx",
cover_list("opt.opt_expr.xbit", "$reduce_xor", "$reduce_xnor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx",
"$lt", "$le", "$ge", "$gt", "$neg", "$add", "$sub", "$mul", "$div", "$mod", "$pow", cell->type.str());
if (cell->type == "$reduce_xor" || cell->type == "$reduce_xnor" ||
cell->type == "$lt" || cell->type == "$le" || cell->type == "$ge" || cell->type == "$gt")
@ -475,13 +475,13 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if ((cell->type == "$_NOT_" || cell->type == "$not" || cell->type == "$logic_not") && cell->getPort("\\Y").size() == 1 &&
invert_map.count(assign_map(cell->getPort("\\A"))) != 0) {
cover_list("opt.opt_const.invert.double", "$_NOT_", "$not", "$logic_not", cell->type.str());
cover_list("opt.opt_expr.invert.double", "$_NOT_", "$not", "$logic_not", cell->type.str());
replace_cell(assign_map, module, cell, "double_invert", "\\Y", invert_map.at(assign_map(cell->getPort("\\A"))));
goto next_cell;
}
if ((cell->type == "$_MUX_" || cell->type == "$mux") && invert_map.count(assign_map(cell->getPort("\\S"))) != 0) {
cover_list("opt.opt_const.invert.muxsel", "$_MUX_", "$mux", cell->type.str());
cover_list("opt.opt_expr.invert.muxsel", "$_MUX_", "$mux", cell->type.str());
log("Optimizing away select inverter for %s cell `%s' in module `%s'.\n", log_id(cell->type), log_id(cell), log_id(module));
RTLIL::SigSpec tmp = cell->getPort("\\A");
cell->setPort("\\A", cell->getPort("\\B"));
@ -564,7 +564,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (input.match(" 1")) ACTION_DO("\\Y", input.extract(1, 1));
if (input.match("01 ")) ACTION_DO("\\Y", input.extract(0, 1));
if (input.match("10 ")) {
cover("opt.opt_const.mux_to_inv");
cover("opt.opt_expr.mux_to_inv");
cell->type = "$_NOT_";
cell->setPort("\\A", input.extract(0, 1));
cell->unsetPort("\\B");
@ -599,7 +599,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
log_assert(GetSize(a) == GetSize(b));
for (int i = 0; i < GetSize(a); i++) {
if (a[i].wire == NULL && b[i].wire == NULL && a[i] != b[i] && a[i].data <= RTLIL::State::S1 && b[i].data <= RTLIL::State::S1) {
cover_list("opt.opt_const.eqneq.isneq", "$eq", "$ne", "$eqx", "$nex", cell->type.str());
cover_list("opt.opt_expr.eqneq.isneq", "$eq", "$ne", "$eqx", "$nex", cell->type.str());
RTLIL::SigSpec new_y = RTLIL::SigSpec((cell->type == "$eq" || cell->type == "$eqx") ? RTLIL::State::S0 : RTLIL::State::S1);
new_y.extend_u0(cell->parameters["\\Y_WIDTH"].as_int(), false);
replace_cell(assign_map, module, cell, "isneq", "\\Y", new_y);
@ -612,7 +612,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (new_a.size() == 0) {
cover_list("opt.opt_const.eqneq.empty", "$eq", "$ne", "$eqx", "$nex", cell->type.str());
cover_list("opt.opt_expr.eqneq.empty", "$eq", "$ne", "$eqx", "$nex", cell->type.str());
RTLIL::SigSpec new_y = RTLIL::SigSpec((cell->type == "$eq" || cell->type == "$eqx") ? RTLIL::State::S1 : RTLIL::State::S0);
new_y.extend_u0(cell->parameters["\\Y_WIDTH"].as_int(), false);
replace_cell(assign_map, module, cell, "empty", "\\Y", new_y);
@ -620,7 +620,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (new_a.size() < a.size() || new_b.size() < b.size()) {
cover_list("opt.opt_const.eqneq.resize", "$eq", "$ne", "$eqx", "$nex", cell->type.str());
cover_list("opt.opt_expr.eqneq.resize", "$eq", "$ne", "$eqx", "$nex", cell->type.str());
cell->setPort("\\A", new_a);
cell->setPort("\\B", new_b);
cell->parameters["\\A_WIDTH"] = new_a.size();
@ -635,7 +635,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
RTLIL::SigSpec b = assign_map(cell->getPort("\\B"));
if (a.is_fully_const() && !b.is_fully_const()) {
cover_list("opt.opt_const.eqneq.swapconst", "$eq", "$ne", cell->type.str());
cover_list("opt.opt_expr.eqneq.swapconst", "$eq", "$ne", cell->type.str());
cell->setPort("\\A", b);
cell->setPort("\\B", a);
std::swap(a, b);
@ -646,7 +646,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
RTLIL::SigSpec input = b;
ACTION_DO("\\Y", cell->getPort("\\A"));
} else {
cover_list("opt.opt_const.eqneq.isnot", "$eq", "$ne", cell->type.str());
cover_list("opt.opt_expr.eqneq.isnot", "$eq", "$ne", cell->type.str());
log("Replacing %s cell `%s' in module `%s' with inverter.\n", log_id(cell->type), log_id(cell), log_id(module));
cell->type = "$not";
cell->parameters.erase("\\B_WIDTH");
@ -661,7 +661,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if ((cell->type == "$eq" || cell->type == "$ne") &&
(assign_map(cell->getPort("\\A")).is_fully_zero() || assign_map(cell->getPort("\\B")).is_fully_zero()))
{
cover_list("opt.opt_const.eqneq.cmpzero", "$eq", "$ne", cell->type.str());
cover_list("opt.opt_expr.eqneq.cmpzero", "$eq", "$ne", cell->type.str());
log("Replacing %s cell `%s' in module `%s' with %s.\n", log_id(cell->type), log_id(cell),
log_id(module), "$eq" ? "$logic_not" : "$reduce_bool");
cell->type = cell->type == "$eq" ? "$logic_not" : "$reduce_bool";
@ -699,7 +699,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
sig_y[i] = sig_a[GetSize(sig_a)-1];
}
cover_list("opt.opt_const.constshift", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", cell->type.str());
cover_list("opt.opt_expr.constshift", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", cell->type.str());
log("Replacing %s cell `%s' (B=%s, SHR=%d) in module `%s' with fixed wiring: %s\n",
log_id(cell->type), log_id(cell), log_signal(assign_map(cell->getPort("\\B"))), shift_bits, log_id(module), log_signal(sig_y));
@ -760,9 +760,9 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (identity_wrt_a || identity_wrt_b)
{
if (identity_wrt_a)
cover_list("opt.opt_const.identwrt.a", "$add", "$sub", "$or", "$xor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", "$mul", "$div", cell->type.str());
cover_list("opt.opt_expr.identwrt.a", "$add", "$sub", "$or", "$xor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", "$mul", "$div", cell->type.str());
if (identity_wrt_b)
cover_list("opt.opt_const.identwrt.b", "$add", "$sub", "$or", "$xor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", "$mul", "$div", cell->type.str());
cover_list("opt.opt_expr.identwrt.b", "$add", "$sub", "$or", "$xor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", "$mul", "$div", cell->type.str());
log("Replacing %s cell `%s' in module `%s' with identity for port %c.\n",
cell->type.c_str(), cell->name.c_str(), module->name.c_str(), identity_wrt_a ? 'A' : 'B');
@ -786,14 +786,14 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") &&
cell->getPort("\\A") == RTLIL::SigSpec(0, 1) && cell->getPort("\\B") == RTLIL::SigSpec(1, 1)) {
cover_list("opt.opt_const.mux_bool", "$mux", "$_MUX_", cell->type.str());
cover_list("opt.opt_expr.mux_bool", "$mux", "$_MUX_", cell->type.str());
replace_cell(assign_map, module, cell, "mux_bool", "\\Y", cell->getPort("\\S"));
goto next_cell;
}
if (mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") &&
cell->getPort("\\A") == RTLIL::SigSpec(1, 1) && cell->getPort("\\B") == RTLIL::SigSpec(0, 1)) {
cover_list("opt.opt_const.mux_invert", "$mux", "$_MUX_", cell->type.str());
cover_list("opt.opt_expr.mux_invert", "$mux", "$_MUX_", cell->type.str());
log("Replacing %s cell `%s' in module `%s' with inverter.\n", log_id(cell->type), log_id(cell), log_id(module));
cell->setPort("\\A", cell->getPort("\\S"));
cell->unsetPort("\\B");
@ -812,7 +812,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (consume_x && mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") && cell->getPort("\\A") == RTLIL::SigSpec(0, 1)) {
cover_list("opt.opt_const.mux_and", "$mux", "$_MUX_", cell->type.str());
cover_list("opt.opt_expr.mux_and", "$mux", "$_MUX_", cell->type.str());
log("Replacing %s cell `%s' in module `%s' with and-gate.\n", log_id(cell->type), log_id(cell), log_id(module));
cell->setPort("\\A", cell->getPort("\\S"));
cell->unsetPort("\\S");
@ -832,7 +832,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
if (consume_x && mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") && cell->getPort("\\B") == RTLIL::SigSpec(1, 1)) {
cover_list("opt.opt_const.mux_or", "$mux", "$_MUX_", cell->type.str());
cover_list("opt.opt_expr.mux_or", "$mux", "$_MUX_", cell->type.str());
log("Replacing %s cell `%s' in module `%s' with or-gate.\n", log_id(cell->type), log_id(cell), log_id(module));
cell->setPort("\\B", cell->getPort("\\S"));
cell->unsetPort("\\S");
@ -856,7 +856,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
int width = cell->getPort("\\A").size();
if ((cell->getPort("\\A").is_fully_undef() && cell->getPort("\\B").is_fully_undef()) ||
cell->getPort("\\S").is_fully_undef()) {
cover_list("opt.opt_const.mux_undef", "$mux", "$pmux", cell->type.str());
cover_list("opt.opt_expr.mux_undef", "$mux", "$pmux", cell->type.str());
replace_cell(assign_map, module, cell, "mux_undef", "\\Y", cell->getPort("\\A"));
goto next_cell;
}
@ -875,17 +875,17 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
new_s = new_s.extract(0, new_s.size()-1);
}
if (new_s.size() == 0) {
cover_list("opt.opt_const.mux_empty", "$mux", "$pmux", cell->type.str());
cover_list("opt.opt_expr.mux_empty", "$mux", "$pmux", cell->type.str());
replace_cell(assign_map, module, cell, "mux_empty", "\\Y", new_a);
goto next_cell;
}
if (new_a == RTLIL::SigSpec(RTLIL::State::S0) && new_b == RTLIL::SigSpec(RTLIL::State::S1)) {
cover_list("opt.opt_const.mux_sel01", "$mux", "$pmux", cell->type.str());
cover_list("opt.opt_expr.mux_sel01", "$mux", "$pmux", cell->type.str());
replace_cell(assign_map, module, cell, "mux_sel01", "\\Y", new_s);
goto next_cell;
}
if (cell->getPort("\\S").size() != new_s.size()) {
cover_list("opt.opt_const.mux_reduce", "$mux", "$pmux", cell->type.str());
cover_list("opt.opt_expr.mux_reduce", "$mux", "$pmux", cell->type.str());
log("Optimized away %d select inputs of %s cell `%s' in module `%s'.\n",
GetSize(cell->getPort("\\S")) - GetSize(new_s), log_id(cell->type), log_id(cell), log_id(module));
cell->setPort("\\A", new_a);
@ -911,7 +911,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
RTLIL::SigSpec y(RTLIL::const_ ## _t(a.as_const(), dummy_arg, \
cell->parameters["\\A_SIGNED"].as_bool(), false, \
cell->parameters["\\Y_WIDTH"].as_int())); \
cover("opt.opt_const.const.$" #_t); \
cover("opt.opt_expr.const.$" #_t); \
replace_cell(assign_map, module, cell, stringf("%s", log_signal(a)), "\\Y", y); \
goto next_cell; \
} \
@ -926,7 +926,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
cell->parameters["\\A_SIGNED"].as_bool(), \
cell->parameters["\\B_SIGNED"].as_bool(), \
cell->parameters["\\Y_WIDTH"].as_int())); \
cover("opt.opt_const.const.$" #_t); \
cover("opt.opt_expr.const.$" #_t); \
replace_cell(assign_map, module, cell, stringf("%s, %s", log_signal(a), log_signal(b)), "\\Y", y); \
goto next_cell; \
} \
@ -1002,7 +1002,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (a_val == 0)
{
cover("opt.opt_const.mul_shift.zero");
cover("opt.opt_expr.mul_shift.zero");
log("Replacing multiply-by-zero cell `%s' in module `%s' with zero-driver.\n",
cell->name.c_str(), module->name.c_str());
@ -1018,9 +1018,9 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
if (a_val == (1 << i))
{
if (swapped_ab)
cover("opt.opt_const.mul_shift.swapped");
cover("opt.opt_expr.mul_shift.swapped");
else
cover("opt.opt_const.mul_shift.unswapped");
cover("opt.opt_expr.mul_shift.unswapped");
log("Replacing multiply-by-%d cell `%s' in module `%s' with shift-by-%d.\n",
a_val, cell->name.c_str(), module->name.c_str(), i);
@ -1056,15 +1056,16 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
}
}
struct OptConstPass : public Pass {
OptConstPass() : Pass("opt_const", "perform const folding") { }
struct OptExprPass : public Pass {
OptExprPass() : Pass("opt_expr", "perform const folding and simple expression rewriting") { }
virtual void help()
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" opt_const [options] [selection]\n");
log(" opt_expr [options] [selection]\n");
log("\n");
log("This pass performs const folding on internal cell types with constant inputs.\n");
log("It also performs some simple expression rewritring.\n");
log("\n");
log(" -mux_undef\n");
log(" remove 'undef' inputs from $mux, $pmux and $_MUX_ cells\n");
@ -1158,6 +1159,6 @@ struct OptConstPass : public Pass {
log_pop();
}
} OptConstPass;
} OptExprPass;
PRIVATE_NAMESPACE_END

8
passes/sat/miter.cc
View File

@ -254,7 +254,7 @@ void create_miter_equiv(struct Pass *that, std::vector<std::string> args, RTLIL:
if (flag_flatten) {
log_push();
Pass::call_on_module(design, miter_module, "flatten; opt_const -keepdc -undriven;;");
Pass::call_on_module(design, miter_module, "flatten; opt_expr -keepdc -undriven;;");
log_pop();
}
}
@ -327,7 +327,7 @@ void create_miter_assert(struct Pass *that, std::vector<std::string> args, RTLIL
if (flag_flatten) {
log_push();
Pass::call_on_module(design, module, "opt_const -keepdc -undriven;;");
Pass::call_on_module(design, module, "opt_expr -keepdc -undriven;;");
log_pop();
}
}
@ -361,7 +361,7 @@ struct MiterPass : public Pass {
log(" also create an 'assert' cell that checks if trigger is always low.\n");
log("\n");
log(" -flatten\n");
log(" call 'flatten; opt_const -keepdc -undriven;;' on the miter circuit.\n");
log(" call 'flatten; opt_expr -keepdc -undriven;;' on the miter circuit.\n");
log("\n");
log("\n");
log(" miter -assert [options] module [miter_name]\n");
@ -375,7 +375,7 @@ struct MiterPass : public Pass {
log(" keep module output ports.\n");
log("\n");
log(" -flatten\n");
log(" call 'flatten; opt_const -keepdc -undriven;;' on the miter circuit.\n");
log(" call 'flatten; opt_expr -keepdc -undriven;;' on the miter circuit.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)

4
techlibs/common/prep.cc
View File

@ -69,7 +69,7 @@ struct PrepPass : public Pass {
log("\n");
log(" prep:\n");
log(" proc\n");
log(" opt_const\n");
log(" opt_expr -keepdc\n");
log(" opt_clean\n");
log(" check\n");
log(" opt -keepdc\n");
@ -134,7 +134,7 @@ struct PrepPass : public Pass {
if (check_label(active, run_from, run_to, "coarse"))
{
Pass::call(design, "proc");
Pass::call(design, "opt_const");
Pass::call(design, "opt_expr -keepdc");
Pass::call(design, "opt_clean");
Pass::call(design, "check");
Pass::call(design, "opt -keepdc");

4
techlibs/common/synth.cc
View File

@ -81,7 +81,7 @@ struct SynthPass : public Pass {
log("\n");
log(" coarse:\n");
log(" proc\n");
log(" opt_const\n");
log(" opt_expr\n");
log(" opt_clean\n");
log(" check\n");
log(" opt\n");
@ -180,7 +180,7 @@ struct SynthPass : public Pass {
if (check_label(active, run_from, run_to, "coarse"))
{
Pass::call(design, "proc");
Pass::call(design, "opt_const");
Pass::call(design, "opt_expr");
Pass::call(design, "opt_clean");
Pass::call(design, "check");
Pass::call(design, "opt");

4
techlibs/common/techmap.v
View File

@ -93,7 +93,7 @@ module _90_shift_ops_shr_shl_sshl_sshr (A, B, Y);
localparam BB_WIDTH = `MIN($clog2(shift_left ? Y_WIDTH : A_SIGNED ? WIDTH : A_WIDTH) + 1, B_WIDTH);
wire [1023:0] _TECHMAP_DO_00_ = "proc;;";
wire [1023:0] _TECHMAP_DO_01_ = "RECURSION; CONSTMAP; opt_muxtree; opt_const -mux_undef -mux_bool -fine;;;";
wire [1023:0] _TECHMAP_DO_01_ = "RECURSION; CONSTMAP; opt_muxtree; opt_expr -mux_undef -mux_bool -fine;;;";
integer i;
reg [WIDTH-1:0] buffer;
@ -136,7 +136,7 @@ module _90_shift_shiftx (A, B, Y);
localparam extbit = _TECHMAP_CELLTYPE_ == "$shift" ? 1'b0 : 1'bx;
wire [1023:0] _TECHMAP_DO_00_ = "proc;;";
wire [1023:0] _TECHMAP_DO_01_ = "CONSTMAP; opt_muxtree; opt_const -mux_undef -mux_bool -fine;;;";
wire [1023:0] _TECHMAP_DO_01_ = "CONSTMAP; opt_muxtree; opt_expr -mux_undef -mux_bool -fine;;;";
integer i;
reg [WIDTH-1:0] buffer;

8
techlibs/ice40/ice40_opt.cc
View File

@ -127,7 +127,7 @@ struct Ice40OptPass : public Pass {
log("\n");
log(" do\n");
log(" <ice40 specific optimizations>\n");
log(" opt_const -mux_undef -undriven [-full]\n");
log(" opt_expr -mux_undef -undriven [-full]\n");
log(" opt_share\n");
log(" opt_rmdff\n");
log(" opt_clean\n");
@ -136,14 +136,14 @@ struct Ice40OptPass : public Pass {
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
string opt_const_args = "-mux_undef -undriven";
string opt_expr_args = "-mux_undef -undriven";
log_header("Executing ICE40_OPT pass (performing simple optimizations).\n");
log_push();
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
if (args[argidx] == "-full") {
opt_const_args += " -full";
opt_expr_args += " -full";
continue;
}
break;
@ -158,7 +158,7 @@ struct Ice40OptPass : public Pass {
for (auto module : design->selected_modules())
run_ice40_opts(module);
Pass::call(design, "opt_const " + opt_const_args);
Pass::call(design, "opt_expr " + opt_expr_args);
Pass::call(design, "opt_share");
Pass::call(design, "opt_rmdff");
Pass::call(design, "opt_clean");

4
techlibs/ice40/synth_ice40.cc
View File

@ -106,7 +106,7 @@ struct SynthIce40Pass : public Pass {
log(" dffsr2dff\n");
log(" dff2dffe -direct-match $_DFF_*\n");
log(" techmap -map +/ice40/cells_map.v\n");
log(" opt_const -mux_undef\n");
log(" opt_expr -mux_undef\n");
log(" simplemap\n");
log(" ice40_ffinit\n");
log(" ice40_ffssr\n");
@ -247,7 +247,7 @@ struct SynthIce40Pass : public Pass {
Pass::call(design, "dffsr2dff");
Pass::call(design, "dff2dffe -direct-match $_DFF_*");
Pass::call(design, "techmap -map +/ice40/cells_map.v");
Pass::call(design, "opt_const -mux_undef");
Pass::call(design, "opt_expr -mux_undef");
Pass::call(design, "simplemap");
Pass::call(design, "ice40_ffinit");
Pass::call(design, "ice40_ffssr");